Phonograph resonance box



. A, 0. PRICE.

PHONOGRAPH RESONANCE BOX.

APPLICATION FILED ocT,9.1919.

1,407,574, Patented Feb.21,1922.

2 SHEETSSHEET I.

A a-Price- KMM A. 0. PRICE.

PHONOGRAPH RESONANCE BOX.

APPLICATION HLED OCT, 9, 19m.

1,407,574, Patented Feb. 21, 1922.

2 SHEETS-SHEET 2- e] um mug s UNITED STATES PATENT OFFICE.

ALBERT 0. PRICE, OF GOSHOCTON, OHIO, ASSIGNOR TO JERRY COMPTON, ,OF OOSHOCTON, OHIO.

rnonoenarn RESONANCE Box.

Specification of Letters Patent.

Patented Feb. 21 1922.

I To all whom it may concern Be it known that I, ALBERT O. Pnion, a

citizen of the United States, residing at Coshocton, in the county of Coshocton and State of Ohio, have invented certain new and useful Improvements in Pl onograph Resonance Boxes, of which the following is .a specification.

This invention relates to an improvement in tone chambers for phonographs and has as its object to. provide a tone chamber which will, to a greater degree than the ordinary tone chamber now in use, enhance the quality of the tones and respond equally well to all tones.

The invention contemplates the provision of .a tone chamber having a resonant area of such size that some portion or another of it will respond to the highest or to the lowest tone so that various tones will be equally and impartially improved in depth and quality and in this respect the tone chamber of the present invention differs materially from a tone chamber having only a rectangular effective area which is limited in its responsiveness to the various tones due to its peculiar size and outline.

In the accompanying drawings:

Figure 1 is a perspective view of a cabinet phonograph equipped with the tone chamber embodying the present invention;

Fig. 2 is a horizontal sectional view through the tone chamber on the line 2-2 of Fig. 3; Y v

Fig. 3 is a vertical longitudinal sectional view therethrou h on the line 3-3 of Fig. 2.

The base of t e tone chamber embodyin the invention comprises 'a sounding boar indicated the numeral 1, this board belng relatively thin and of any of the various .woods or metals employed in the manufacture of musical sounding boards. At its margin the board 1 is supported upon a base frame, indicated in general by the numeral 2, this frame being, as also the board, rectangular in outline and hem designed for location within the body of t e phonograph cabinet in the manner shown in Fig. 1 of the drawings. This cabinet is indicated in general in the drawings by the numeral 3 and is provided with the usual open front 4 through which the sound waves issue. The top or base upon whichthe sound arm is mounted for turning movement is indicated in general by the numeral 5 and the said sound arm is indicated at 6. The throat of the tone chamber includes a rear wall 7, side walls 8 and a front wall 9, the throat being here shown as rectangular, although it may assumesome other configuration if found desirable. In any event it is mounted at'its lower end upon the sounding board 1 at the rear side thereof and if desired a block 10 may be placed in the lower end of the throat and provided with a deflecting surface 11 for directing the sound waves in a general forward direction and through the forward side of the said throat which is open, as at 12, at its lower portion.

The tone chamber proper includes side walls 13 and a top wall 14, the side walls 13 are connected at their rear ends to the opposite sides of the open front 12 of the throat of the box' and extend forwardly in diverging planes and preferably terminate at their .forward ends at the forward corners of the base. The lower edges of the side walls 13 of the box rest square upon the upper surface of the sounding board 1 and are secured firmly in this position by screws or other fastening'elements 15. The upper edges of the side walls 13 of the tone chamber are in- -clined upwardly and forwardly from the rear ends of the said side walls and the top wall 14 is disposed at its lateral. edges upon the said upper edges of the side walls and secured thereto in any suitable manner. The top 14 is therefore inclined upwardly and of the box, or in other words, gradually increases from the throat end of'thebox to the -mouth end thereof. Due to this fact some portion or another of this part of the surface of the sounding board, which art of the surface constitutes the most effective area of the board, will respond to any tone whether it be high, low or medium. For example, the narrower portion of the effective soundin 1 board will vibrate most in response to the higher tones and the broader portions forwardly and it is gradually increased in of the effective board will vibrate most in response to the lower tones.

llhile that part of the sounding board lying between the side walls of the tone chamber has been termed the effective area of the said board, nevertheless, it will be an derstood that the parts of the board exterior to the tone chamber proper will also be more or less effective in improving the quality of the tones.

Having thus described the invention, whatis claimed as new is:

1. In Sound reproduction apparatus. a cabinet having a compartment, a relatively thin horizontally disposed sounding board forming the bottom of said compartment, and a tone chamber housed within the compartment and comprising a throat having its delivery end located at the upper side ot the said sounding board side walls secured to and upstanding from the sounding board and arranged in planes diverging in a forward direction from the said delivery. end of the throat, and a top wall extending between the side walls and inclined upwardly and forwardly from the said end of the throat.

2. In sound reproduction apparatus, a tone chamber comp-rising a -relatively thin sounding board forming the bottom of said chamber, a sound delivery throat having its delivery end located at the upper side .of the said sounding board, side walls secured to and upstanding from the sounding board and arranged in planes diverging in a forward direction from the delivery end of the throat, and a top wall extending between the sidewalls and inclined upwardly and forwardly from the said end of the throat, the sounding board atopposite sides projecting beyond the planes of the said side walls and having its projecting portions free from contacting parts.

junction with the sounding board a tone- Chamber, the said side walls extending from the delivery throat to the delivery opening in forwardly diverging planes and having their lower edges disposed continuously in contact with the upper surface of the sounding board, the top wall of the tone chamber extending between the upper edges of the side walls and being inclined upwardly from the delivery throatto the delivery opening, the side walls and top wall terminating at their forward ends respectively at the sides and top of the delivery opening, the sound ing board, beyond the sides of the tone chamber, being devoid of contacting parts.

In testimony whereof I attix my signature.

ALBERT o. Pinon 14. 8. 

